Cook spaghetti; drain.,Combine eggs and Parmesan.,Stir into spaghetti.,Layer 1/2 spaghetti and 1/2 Mozzarella twice in a 9 x 13-inch pan.,Bake at 350° for 10 minutes.,Brown ground beef; drain well.,______,Heat while spaghetti is baking. Pour sauce over baked spaghetti.,Let set 10 minutes before serving.